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CRC claculation in S7 1200

Created by: kodesis at: 11/24/2010 2:42 PM (1 Replies)

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11/24/2010 2:42 PM	Rate (0)
kodesis Advanced Member Joined: 12/10/2009 Last visit: 6/15/2022 Posts: 4 Rating: (0)	Hello! I'm posting same question in S7 1200 forum cause I got no answer in Communication forum. I need to develop a driver for Aurora Comunication protocol RS485 (PowerOne inverters for solar power stations). The inverters have two CRC check bytes at the end of the communication frame. CRC calculation is according to CCITT standard 16bit polynomial Bn=N^16+N^12+N^5+Bn-1. I wonder how to calculate that value inside S7 1211C CPU. Is it necesary to inculde CRC calculation in the protocol. I'm wondering if requests with wrong CRC code will be ignored by the inverter or not? Are there any samples, for RS485 comm. or CRC calculation check implementation on S7 1200. Best regards, Miran

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11/24/2010 2:54 PM	Rate (0)
O_Moderator Diamond Member Joined: 4/24/2009 Last visit: 8/20/2024 Posts: 2682 Rating: (135)	Thread closed, because question is already published in the following thread CCITT CRC calculation in S7 1200 . Best regards O_Moderator
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